Assuming GOW 2, Horizon 2, began development in 2017 and 2018, 2-3 years of development would have already passed and the specs of the game games would have already been laid out. This has already been confirmed by GG and SM. COVID wouldn't have suddenly made them make the decision to make it cross gen. Development started on PS4, Sony introduced the PS5 dev kits later on, and the companies saw an opportunity for max profit by making a boosted PS4 version for the PS5. GT7 probably wasn't that far along development anyway since it's GT and there was enough time to make it cross gen.